| Wierd Onan issue [message #135600] |
Fri, 22 July 2011 18:20  |
Smitty52
Messages: 181
Registered: July 2007
Karma: 0
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Senior Member |
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Finally got around to playing with the Onan today and installed the new fuel pump from JimK. Hooked it up to the carb, put a fuel line in a gas can and ran the pump off a battery with jumpers. Onan fired and ran for the first time in 10 months. Shut if off and checked power at the Onan feed wire to the pump and it is hot during crank and run. Hooked the pump up to the Onan power and still using the gas can and it won't start. Battery was a little weak so started the coach and the Onan fired right off using the inside switch. Shut the coach off and the onan continued to run just fine. Shut it down and it would not restart even using the inside switch. Start the coach and the onan fired right off. Unhooked power from the coach to the onan and used the battery jumpers and it would not start.
It seems that the onan wants to start only if the coach is running. Any ideas on how to get the onan to run without having to start the coach first?
Wayne and Lisa,
Bolton Landing, NY,
Patriot Guard Rider,
Standing for those who stood for us.
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| Re: Wierd Onan issue [message #135603 is a reply to message #135600] |
Fri, 22 July 2011 19:22  |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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Senior Member |
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| Smitty52 wrote on Fri, 22 July 2011 16:20 |
... It seems that the onan wants to start only if the coach is running. Any ideas on how to get the onan to run without having to start the coach first?
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I notice in your sig that you have a Royale. They were outfitted with an odd ball house/generator battery set-up. Is your set-up still as OEM? If so, I would suspect a bad 12v battery in the rear and some poor connections.
If I owned a Royale, I would consider changing to a house battery system using the later GM system as a model... except with a pair of 6v golf carts.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Wierd Onan issue [message #135614 is a reply to message #135600] |
Fri, 22 July 2011 20:14 |
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Batteries not charged up completely. Just give them a good charge and all
should be well. If not, clean up the connections, make sure they're full of
water, and / or replace the batteries.
www.gmcws.org/Tech/dsimmons/onan/Onan_Trouble_Shooter.pdf
bdub
-----Original Message-----
From: On Behalf Of Wayne E LaMothe
Finally got around to playing with the Onan today and installed the new fuel
pump from JimK. Hooked it up to the carb, put a fuel line in a gas can and
ran the pump off a battery with jumpers. Onan fired and ran for the first
time in 10 months. Shut if off and checked power at the Onan feed wire to
the pump and it is hot during crank and run. Hooked the pump up to the Onan
power and still using the gas can and it won't start. Battery was a little
weak so started the coach and the Onan fired right off using the inside
switch. Shut the coach off and the onan continued to run just fine. Shut it
down and it would not restart even using the inside switch. Start the coach
and the onan fired right off. Unhooked power from the coach to the onan and
used the battery jumpers and it would not start.
It seems that the onan wants to start only if the coach is running. Any
ideas on how to get the onan to run without having to start the coach first?
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